The Kokuyo Edge Title Notebook has edge margins that allow you to write headlines, titles and dates to organize your notes. To be uber organized you can even color the edges with a highlighter so that they become colored side indexes. The format makes it easy for you to write subjects, note dates and more so that your records become easy to search and review. These notebooks are compatible with the Kokuyo Systemic Notebook Cover series so that you can take advantage of pockets, a cloth bookmark and more.